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| Registros recuperados: 102 | |
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| SELLERS,Samuel; BILSBORROW,Richard; SALINAS,Victoria; MENA,Carlos. |
| ABSTRACT This paper examines changes over time for a full generation of migrant settlers in the Northern Ecuadorian Amazon (NEA). Data were collected from a 2014 household survey covering a subsample of households surveyed previously in 1990 and 1999. We observed changes in demographic behavior, land use, forest cover, and living conditions. As the frontier develops, human fertility is continuing to decline with contraceptive prevalence rising. Meanwhile, out-migration from colonist households, largely to destinations within the region, persists. More households have secure land tenure than in 1999, and are better off as measured by possession of assets. There is continued growth in pasture, largely at the expense of forest. Farms still serve as an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Family planning; Deforestation; Livelihoods; Migration. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000400321 |
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| ROZON,Christine; LUCOTTE,Marc; DAVIDSON,Robert; PAQUET,Serge; OESTREICHER,Jordan Sky; MERTENS,Frédéric; PASSOS,Carlos José SOUSA; ROMANA,Christine. |
| Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in the state of Pará. We contrast 11 watersheds that are generally representative of the colonization dynamics in the region. For this purpose, Landsat satellite images from three different years, 1986, 2001, and 2009, were analyzed with Geographic Information Systems. Individual images were subject to an unsupervised classification using the Maximum Likelihood Classification algorithm available on GRASS. The classes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deforestation; Watershed scale; Landsat Satellite Images; Cities; Roads. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200203 |
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| ELLWANGER,JOEL HENRIQUE; KULMANN-LEAL,BRUNA; KAMINSKI,VALÉRIA L.; VALVERDE-VILLEGAS,JACQUELINE MARÍA; VEIGA,ANA BEATRIZ G. DA; SPILKI,FERNANDO R.; FEARNSIDE,PHILIP M.; CAESAR,LÍLIAN; GIATTI,LEANDRO LUIZ; WALLAU,GABRIEL L.; ALMEIDA,SABRINA E.M.; BORBA,MAURO R.; HORA,VANUSA P. DA; CHIES,JOSÉ ARTUR B.. |
| Abstract Amazonian biodiversity is increasingly threatened due to the weakening of policies for combating deforestation, especially in Brazil. Loss of animal and plant species, many not yet known to science, is just one among many negative consequences of Amazon deforestation. Deforestation affects indigenous communities, riverside as well as urban populations, and even planetary health. Amazonia has a prominent role in regulating the Earth’s climate, with forest loss contributing to rising regional and global temperatures and intensification of extreme weather events. These climatic conditions are important drivers of emerging infectious diseases, and activities associated with deforestation contribute to the spread of disease vectors. This review... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon rainforest; Biodiversity; Emerging infectious disease; Deforestation; Pathogens; Public health. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100724 |
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| DOURADO,EDUARDA D.R.; FERREIRA-KEPPLER,RUTH L.; MARTINS,RENATO T.; RONDEROS,MARIA M.. |
| ABSTRACT We assessed the immature stages of Ceratopogonidae (Diptera) in artificial containers in an urban forest fragment in Manaus (Brazil), including their behavioral, biological and ecological information. In addition, we evaluated the effects of deforestation in an open and forested area on Ceratopogonidae communities. Immatures were sampled between August 2012 and July 2014 in artificial containers installed in both habitat types. We collected 685 immatures of seven morpho-species of Bezzia Kieffer, Culicoides Latreille, Dasyhelea Kieffer, Forcipomyia Meigen, and Palpomyia Meigen. In the open area, we recorded higher temperature and electrical conductivity values than in the forested area; however, these variables did not differ between seasons.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Aquatic insects; Artificial containers; Deforestation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602757 |
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| ISAAC,VICTORIA J.; ALMEIDA,MORGANA C.; GIARRIZZO,TOMMASO; DEUS,CLAUDIA P.; VALE,ROZEILZA; KLEIN,GILMAR; BEGOSSI,ALPINA. |
| ABSTRACT The present study analyzed and compared the daily consumption of foods of animal origin in eleven communities of the Lower Amazon, Trombetas and Purus Rivers, representing three different management systems and levels of conservation in the Brazilian Amazon. All food items of animal origin were weighed by at least 10% of the families in the study communities during a week in each period of the flood cycle between 2006 and 2008. Fish was the most important food, and was consumed during six days of the week, with an average rate of 169 kg.person-1.year-1. Game was second in importance, with 37 kg.person-1.year-1. This yearly rate of fish consumption is one of the highest in the world and is almost double the minimum recommended by the World Health... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Game meat; Management; Deforestation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502229 |
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| SENNA,MÔNICA C.A.; COSTA,MARCOS H.; DAVIDSON,ERIC A.; NOBRE,CARLOS A.. |
| Amazon tropical forests are being replaced by pasturelands and croplands, but they sometimes revert to regrowth forest when abandoned after a period of agricultural use. Research suggests that this secondary regrowth is limited by climate and nutrient availability and, using a coupled biosphere-atmosphere model, we investigated patterns in the regrowth of the Amazon rainforest after a full deforestation event, considering different types of nutrient stress. We found that, over a 50 year regrowth period, the reduction of precipitation caused by large-scale deforestation was not sufficient to prevent secondary forest regrowth, but this decrease in precipitation combined with nutrient limitation, due to logging and frequent fires, did indeed prevent forest... |
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Palavras-chave: Amazon; Climate; Deforestation; Ecosystem model; Net primary production; Savannization. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200621 |
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| Casatti,Lilian; Brejão,Gabriel Lourenço; Carvalho,Fernando Rogério; Silva,Hugmar Pains da; Pérez-Mayorga,María Angélica; Manzotti,Angelo Rodrigo; Zeni,Jaquelini de Oliveira; Ramires,Bruno Martins Santos; Langeani,Francisco. |
| Abstract: The replacement of tropical forests to production systems is one of the leading causes of riverine ecosystem alterations. However, current assemblages’ composition may also result from the time since these transformations have begun. Therefore, the knowledge of diversified historical scenarios can facilitate the accomplishment of actions that involve the aquatic environments recovery. In this study, an inventory of stream fish was carried out in basins whose deforestation was intensified in the last 20 years, to compose a baseline for ecological and taxonomic studies. The habitat, physical and chemical variables, and the fish assemblages from 60 streams in the northwest region of the state of Mato Grosso, in the Aripuanã and Juruena river basins,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inventory; Neotropical ichthyofauna; Deforestation; Baseline; Characidae. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100309 |
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| Salm,Rodolfo; Feder,Lisa; Jalles-Filho,Euphly; Jardim,Mario Augusto Gonçalves. |
| Although scientists and policy makers embrace the general concept "sustainable development", there are few who agree on how to carry out sustainable development in specific situations. As such, sustainable development projects among ethnoscientists are widely critiqued as to how well they are inter-culturally formulated. Here we report on a controversial case of planting coconuts in Kayapó Indian villages of southern Pará, Brazil and offer our own self-critique. We began under the premise that reforestation and Kayapó general health/nutrition go hand in hand. Therefore, the flourishing of coconut culture will contribute to forest conservation in the long run, in itself, and simultaneously, maintain good nutrition for the Kayapó people who protect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coconuts; Deforestation; Economy; Indians; Palm; Seed dispersal; Tropical Forest. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000100014 |
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| Pereira,Thamires Almeida; Passos,Paula de Oliveira; Santos,Lidiane Alves dos; Lücking,Robert; Cáceres,Marcela Eugenia Da Silva. |
| Abstract In the frame of an ongoing lichen inventory of Atlantic Rainforest remnants in Northeast Brazil, five new species of Graphidaceae were discovered in a small forest fragment, Mata do Cipó, in Sergipe state, the smallest state of Brazil and among those with the highest deforestation rate in the country. An additional new species had already been collected in Panama before and was now also found in the Mata do Cipó and is described here as well. In total, 40 species of Graphidaceae are reported for this remnant, including a large number of taxa indicative of well-preserved rainforest. The new species are: Fissurina atlantica T.A. Pereira, M. Cáceres & Lücking, sp. nov., Graphis subaltamirensis Passos, M. Cáceres & Lücking, sp. nov.,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deforestation; Fragmentation; Lichen diversity; Graphidaceae; Refugia; Sergipe. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100212 |
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| Cintra,Roberta Hehl de Sylos; Santos,José Eduardo dos; Moschini,Luiz Eduardo; Pires,José Salatiel Rodrigues; Henke-Oliveira,Carlos. |
| A qualitative and quantitative analysis of the environmental damages occurrences was conducted through the lawful documents established for charging at the State Prosecution Service of São Carlos city, State of São Paulo, during 1991 - 2000, to understand the relationship between environmental problems and the current development actions. The environmental damage identified were grouped into nine classes, where deforestation was prevailing in each year along the period of study. Of the total number of deforestation occurrences, 180 was related to areas smaller than 5 ha. It corresponded to 110.35 ha of the total deforested area. The other 37 were associated with areas higher than 5 ha, equivalent to 1,013.27 ha. The registers of environmental damages in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental damages; Deforestation; Lawful documents. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700017 |
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| Registros recuperados: 102 | |
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